Circumcision [the sign of the covenant of Abraham] is indeed of value if you practice the Law; but if you habitually break the Law, your circumcision has become uncircumcision [it is meaningless in God’s sight]. So if the uncircumcised man keeps the requirements of the Law, will not his uncircumcision be regarded [by God] as circumcision? Then he who is physically uncircumcised but keeps [the spirit of] the Law will judge you who, [l]even though you have the written code and circumcision, break the Law. For he is not a [real] Jew who is only one outwardly, nor is [true] circumcision something external and physical. But he is a Jew who is one inwardly; and [true] circumcision is circumcision of the heart, by the Spirit, not by [the fulfillment of] the letter [of the Law]. His praise is not from men, but from God. – Romans 2:25-29
Who has an internal work of grace upon his soul: who has not only an outward name, but an inward nature; not the law of God in the hand, but in the heart; not an external righteousness only, but internal holiness; and who is not a mere outward court worshipper, but a worshipper of God in Spirit and in truth. – Gill
How shall we draw the Spirit? He is invisible. Let’s use arrows. Draw an arrow from the Law in the middle down to the heart. The Spirit takes the Law and writes it on the heart (Jeremiah 31:33; Ezekiel 11:19-20; 36:27) so that we love it and it becomes part of us, rather than being merely an external pressure from the outside.
Then draw another arrow from the heart up through the Law to God. The Spirit not only takes the Law through our eyes into our hearts; it also takes us through the Law into God. And that’s the ultimate goal of the Law: a personal relationship of love with the living God through his Word. – John Piper
Doctor Luke, the beloved physician, a Gentile who writes his gospel and the Acts of the Apostles. Think of his life; he has no other gods but the Father, the Son and the Holy Spirit. He hates idols and idol worship. He never takes God’s name in vain. Each week he has a day in which he gives himself to worship and to works of medical necessity. He honours his parents. He does no violence to anyone; he is not guilty of any sexual misdemeanor; he does not steal or lie or covet. All the twelve apostles and Jewish Christians in every church in Judea, Asia Minor, Greece and Rome never think of him in any way other than he is their circumcised brother – though he is not, but his godly and loving character have won the admiration of them all. “Luke our uncircumcised and yet circumcised Gentile brother” because they have learned to appreciate that what counted was not the knife cutting away the foreskin, but a heart that’s been circumcised. Paul is saying this (summarizes John Stott), “Circumcision minus obedience equals uncircumcision. Uncircumcision plus obedience equals circumcision.” Geoff Thomas